package cn.edu.scau.cmi.liujiaming.chapter05;

public class Lader {
	double above,height;
	static double bottom;
	void setAbove(double above) {
		this.above=above;
	}
	void setBottom(double b) {
		Lader.bottom=b;
	}
	double getAbove() {
		return above;
	}
	double  getBottom() {
		return bottom;
	}
}